It comes after businesses noted they still don't know what arrangements will be made in a host of areas, including tariffs, taxes, customs and aviation. U.K. voters chose to leave the European Union two years ago.

Britain is due to leave the 28-nation bloc in March, and the EU has warned that May's government must provide realistic proposals soon or risk crashing out without a deal.

Two days earlier, May announced she had finally united her quarrelsome government behind a plan for Brexit. On Friday, Davis and the rest of May's fractious Cabinet agreed on a plan for ties with the EU after the U.K. leaves next year.

Davis was a strong pro-Brexit voice.

On Monday, May is due to brief lawmakers on the plan agreed by the Cabinet during its 12-hour meeting. It seeks to keep the U.K. and the EU in a free-trade zone for goods, and commits Britain to maintaining the same rules as the bloc for goods and agricultural products.

Some Brexit-supporting lawmakers are angry at the proposals, saying they will keep Britain tethered to the bloc and unable to change its rules to strike new trade deals around the world.

The EU has warned Britain that time is running out to seal a divorce deal.